44 documents found, page 1 of 5

Concrete protection against carbonation by traditional coatings

In contemporary construction practice, concrete surfaces are commonly coated; however, this factor is often disregarded in durability assessments, particularly with respect to carbonation. Such omission may lead to overly conservative designs and unnecessary material consumption. This study evaluates the actual performance of traditional coatings applied to concrete, considering three types of concrete: ordinar...

Impact of combined action of chloride and carbonation on cement-based materials...

Integrating waste and industrial by-products into concrete is an alternative way to reduce global cement consumption, enhancing its eco-friendliness. In this context, residues with fly ash have been increasingly utilised. Considering the vulnerability of concrete with fly ash to carbonation and, at the same time, its high resistance to chlorides, it is important to investigate the behaviour of these concretes u...

Targeting BUB3 in combination with paclitaxel inhibits proliferation of gliobla...

Glioblastoma (GBM) is the most common malignant primary brain tumor, with remarkably poor prognosis and survival rates. Existing treatments cannot cure GBM patients, and GBM recurrence remains a clinical bottleneck. To explore new GBM chemotherapeutic targets and new therapeutic strategies, the role of the spindle assembly checkpoint (SAC) protein BUB3 in GBM was investigated. We found BUB3 overexpression to be...

3D-scaffolds for bone replacement

Bone is the world's second most transplanted tissue, and there is a high demand for bone substitutes, which leads to a decrease in bone bank donors. Three-dimensional scaffolds based on Ti6Al4V, ZrO2, and PEEK were developed and characterized in this study. The mechanical performance of the scaffolds was investigated using experimental mechanical compressive tests and finite element analysis. Also, their in vit...

Synthesis of mussel-inspired polydopamine-gallium nanoparticles for biomedical ...

Made available in DSpace on 2021-06-25T10:49:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01; Aim: To established a simple, controlled and reproducible method to synthesize gallium (Ga)-coated polydopamine (PDA) nanoparticles (NPs). Materials & methods: PDA NPs were synthesized in alkali medium with posterior Ga shell formation due to ion chelation on the NP surface. Results: The obtained result...

A primer on understanding Google Earth Engine APIs

This article is build on the experience of using Google Earth Engine as a development framework for a previous work by the same authors.Being primarily a distributed parallel computing platform, it is designed around a functional language pattern, even though supported on an object model, and a map / reduce distributed workload paradigm.Leveraging the sheer computing power delivered by the Google infrastructure...

Identificação das forças motrizes das alterações do uso e ocupação do solo em P...

Post-wildfires effects on physicochemical properties of surface water: the case...

In Portugal, wildfires are frequent and sometimes catastrophic and responsible for high damages and human losses. They have been especially intense in the Center Region of Portugal, where the Zêzere watershed is located. This research presents an analysis of the temporal and spatial occurrence of these events within the watershed. It was observed that the extent of the burned areas has a high annual variation a...

Perceção do risco hidro-geomorfológico em Portugal: resultados de um questionár...

Revestimentos tradicionais como proteção de betões de elevado volume de cinzas ...

Os betões de elevado volume de cinzas volantes poderão ser materiais com melhor desempenho do que os betões correntes de cimento Portland. Além disso, são ambientalmente mais sustentáveis porque a sua composição contém menos clínquer e, ainda, porque incorporam um subproduto industrial poluente. No entanto, a sua resistência à carbonatação é reduzida, porque, através da própria reação pozolânica, dá-se a neutra...